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Perovskite solar cell taking organic amine as an interface modification layer and preparation method thereof

A technology for interface modification layers and solar cells, which can be applied in circuits, photovoltaic power generation, electrical components, etc., and can solve problems that affect the stability and photoelectric conversion efficiency of perovskite cells, van der Waals force or weak hydrogen bond, weak force, etc. , to achieve the effects of improving photoelectric conversion efficiency, improving charge collection efficiency, and improving affinity

Inactive Publication Date: 2019-08-27
北京宏泰创新科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Commonly used interface modification layer materials include dimethyl sulfoxide, pyridine, ethanol, naphthalene thiol, etc. These substances can play a role in interface modification and passivation to a certain extent, but such interface modification materials are usually produced by van der Waals force. Or hydrogen bonding to reduce defects, while van der Waals force or hydrogen bonding is relatively weak; some studies have also carried out single-containing single-hydroxy organic amine compounds as interface modification layers, but only relying on the chemical bonds of single-hydroxy organic amines, the force is still Therefore, the interface defects between the electron transport layer or the hole transport layer and the perovskite absorption layer of the perovskite battery modified by the above two types of substances are still very serious, which affects the stability of the perovskite battery and photoelectric conversion efficiency

Method used

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  • Perovskite solar cell taking organic amine as an interface modification layer and preparation method thereof
  • Perovskite solar cell taking organic amine as an interface modification layer and preparation method thereof
  • Perovskite solar cell taking organic amine as an interface modification layer and preparation method thereof

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preparation example Construction

[0027] The present invention also provides a method for preparing the above-mentioned perovskite solar cell using an organic amine as an interface modification layer, comprising:

[0028] 1) Prepare an electron transport layer or a hole transport layer on the transparent conductive layer;

[0029] 2) depositing the hydroxyl-containing organic amine solution on the electron transport layer or the hole transport layer to obtain an interface modification layer;

[0030] 3) Prepare a perovskite absorber layer on the interface modification layer;

[0031] 4) preparing a hole transport layer or an electron transport layer on the perovskite absorber layer;

[0032] 5) A back electrode layer is prepared on the hole transport layer or the electron transport layer.

[0033] The preparation method of the interface modification layer adopts the method of spin coating a hydroxyl-containing organic amine solution, wherein the concentration of the hydroxyl-containing organic amine solution...

Embodiment 1

[0047] like figure 1 The formal structure diagram of the perovskite solar cell shown, and the specific preparation method is as follows:

[0048] 1) Clean the FTO conductive substrate with a thickness of 80 nm.

[0049] 2) Spin-coating SnO on FTO conductive substrate 2 Aqueous solution, annealed at 180 °C to obtain an electron transport layer with a thickness of 100 nm.

[0050] 3) Spin-coat (OH) at a concentration of 2 mM on the electron transport layer 2 CHCH 2 NH 2 (Structure like image 3 shown) aqueous solution, the spin coating speed was 3000 rpm, the spin coating time was 20 s, and annealed at 100 °C to obtain an interface modification layer with a thickness of 10 nm.

[0051] 4) Preparation of PbI 2 The DMF / DMSO mixture (V DMF :V DMSO =9:1) and the isopropanol mixed solution of FAI, MABr, MAC1;

[0052] Spin-coating PbI on the interface modification layer 2 The DMF / DMSO mixture was annealed at 70 °C to obtain PbI 2 film layer;

[0053] in PbI 2 The mixed ...

Embodiment 2

[0057] like figure 1 The formal structure diagram of the perovskite solar cell shown, and the specific preparation method is as follows:

[0058] The specific preparation steps are as described in Example 1, except that:

[0059] 3) Spin coating (OH) at a concentration of 0.05 mM on the electron transport layer 2 CHCH 2 NH 2 (Structure like image 3 shown) aqueous solution, spin coating speed of 4000 rpm, spin coating time of 10 s, and annealing at 100 °C to obtain an interface modification layer with a thickness of 5 nm.

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Abstract

The invention discloses a perovskite solar cell taking hydroxyl-containing organic amine as an interface modification layer. The perovskite solar cell comprises a transparent conductive layer, an electron transmission layer, a perovskite absorption layer, a hole transmission layer and a back electrode layer, wherein the interface modification layer is arranged between the perovskite absorption layer and the electron transmission layer or the hole transmission layer, the perovskite solar cell is characterized in that the interface modification layer is the hydroxyl-containing organic amine, thestructure formula of the hydroxyl-containing organic amine is R(OH)x(NH2)y, R is alkyl of C1-C12 or substituted or non-substituted aryl, x is more than or equal to 2, and y is more than or equal to 1. The hydroxyl-containing organic amine provided by the invention is used as the interface modification layer, the appetency of the electron transmission layer or the hole transmission layer is improved, better carrier transmission is achieved, electron recombination is reduced, and the photoelectric conversion efficiency of the prepared perovskite solar cell can reach 20.38%.

Description

technical field [0001] The invention relates to the technical field of perovskite solar cells, in particular to a perovskite solar cell with an organic amine as an interface modification layer and a preparation method thereof. Background technique [0002] Solar cells use the photovoltaic effect to directly convert sunlight energy into electrical energy, which is one of the most effective means of utilizing solar energy. Device lifetime and photoelectric conversion efficiency (PCE) are two key factors that determine the final power generation cost of a solar cell. In recent years, organic-inorganic hybrid perovskite solar cells have attracted much attention from academia and industry due to their high efficiency, simple fabrication, and low cost. The photoelectric conversion efficiency of perovskite solar cells has rapidly increased to 23.7% in the past few years, which has surpassed commercial cadmium telluride and copper indium gallium selenide solar cells and is the fast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/44H01L51/48
CPCH10K71/12H10K85/60H10K30/88H10K30/30Y02E10/549
Inventor 魏文超唐泽国
Owner 北京宏泰创新科技有限公司
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